Electrooxidative coupling of salts of nitro compounds with halide, nitrite, cyanide, and phenylsulfinate anions
作者:A. I. Ilovaisky、V. M. Merkulova、Yu. N. Ogibin、G. I. Nikishin
DOI:10.1007/s11172-006-0007-7
日期:2005.7
salts of primary and secondary nitrocompounds (nitroethane, 1- and 2-nitropropanes, nitrocyclohexane, and nitrocycloheptane) in the presence of excess halide, nitrite, cyanide, and phenylsulfinate anions under undivided and divided amperostatic electrolysis conditions in a two-phase medium (CH2Cl2/H2O) produces geminal nitrohalides (35–85% yields), dinitro compounds (15–51%), nitronitriles (6–27%)
NUCLEOPHILIC SUBSTITUTION REACTION VIA ONE ELECTRON TRANSFER PROCESSES. II A NEW SYNTHETIC METHOD FOR THE PREPARATION OF α,β-UNSATURATED ESTERS AND KETONES
An efficient one-pot synthesis of α,β-unsaturated esters and ketones consisting of the coupling reaction of α-chloronitroalkanes with the anions of diethyl α-alkylmalonates or ethyl α-alkylacetoacetates followed by deethoxycarbonylation and concomitant elimination of the nitro group is described.
Reactions of 1-Halo-1-nitroso- and 1-Halo-1-nitrocycloalkanes with Triphenylphosphine. A New Synthesis of Lactam
作者:Ikuo Sakai、Norio Kawabe、Masaji Ohno
DOI:10.1246/bcsj.52.3381
日期:1979.11
Reactions of 1-halo-1-nitroso- and 1-halo-1-nitrocycloalkanes with triphenylphosphine have been carried out. The Perkov reaction and Beckmann rearrangement occurred successively with the formation of lactams in high yields. The reaction of cycloalkanone oxime with halogen in the presence of triphenylphosphine also gave lactams in one step.
Chlorination of Oximes with Aqueous H<sub>2</sub>O<sub>2</sub>/HCl System: Facile Synthesis of <i>gem</i>-Chloronitroso- and <i>gem</i>-Chloronitroalkanes, <i>gem</i>-Chloronitroso- and <i>gem</i>-Chloronitrocycloalkanes
Chlorination of cyclic and linear ketone oximes with aqueous H2O2/HCl in a two-phase dichloromethane-water system selectively affords gem-chloronitroso compounds in yields of up to 94%. One-pot oxidation of the resulting gem-chloronitroso compounds with peracetic acid, prepared in situ, gives gem-chloronitroalkanes and cycloalkanes in yields of up to 82%. The advantages of the method are that it is facile and environmentally benign and does not require gaseous chlorine.